56289870 has 256 divisors, whose sum is σ = 193536000. Its totient is φ = 11321856.

The previous prime is 56289859. The next prime is 56289887. The reversal of 56289870 is 7898265.

56289870 is a `hidden beast` number, since 562 + 8 + 9 + 87 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 712491 + ... + 712569.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^56289870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56289870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96768000).

56289870 is an abundant number, since it is smaller than the sum of its proper divisors (137246130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56289870 is a wasteful number, since it uses less digits than its factorization.

56289870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 56289870 is about 7502.6575291692. The cubic root of 56289870 is about 383.2452215044.

The spelling of 56289870 in words is "fifty-six million, two hundred eighty-nine thousand, eight hundred seventy".